We must be careful when we( )the road.
We must be careful when we( )the road.
填空 we must be careful when we___ the road
We must be careful when you go _____(cross) the road.
We must be very careful when we go across the m___ road
So we must be careful when we use the Internet.
When the fire d----- is high,we must be careful.We must not
we --- be careful when we'er walkung across the road there'r
We must be careful_____(cross) the road.
You must be careful when you cross the road.(改为祈使句)
We must ___(be) careful.
Paul,______(be) careful when you cross the road.
We must be careful when we play sports. 变为一般疑问句